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Benedikt BauerDec 18 '12 at 11:11

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Claudio FiandrinoDec 18 '12 at 11:13

Can you post a link to an image showing what you need? A user with sufficient privileges will edit your question and insert it then. Plus it would be nice to post your code so far.
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Count ZeroDec 18 '12 at 11:15

the description in the question sounds to me like a dynkin diagram. if that's the case, the circles here are much larger than the usual in such diagrams, and/or the arrowhead much smaller.
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barbara beetonDec 18 '12 at 14:05

@barbara: Yes, then it is more difficult (not the size of the circles; that could just be a, say, inner sep=.75ex, but all the other dynkin diagram reqs, like double lines with large angle arrows etc.)
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morbusgDec 20 '12 at 6:50